I've seen a lot of males in my garden. They breed in a neighbour's palm trees, and they like to bask on our frangipanis and feed from the lantanas.
I haven't seen any females in our garden; I had to go to the Royal Botanical Gardens to see them. In April 2004 the Botanical Gardens were swarming with these butterflies, at least the bit where the palms are. There were less in May but still a few of them around.

Sightings
Ingleburn - April and May 2004.
Royal Botanical Gardens, Sydney - April, May 2004; January, February 2005